Swali: Baba wa Rais wa Kenya ni nani?
Jibu swali kwa Yes au No. Ikiwa haiwezekani basi jibu None.
Kidokezo: 
Baba ni mwanamume aliyemzaa mtoto au anamlea. 
Katika uzazi, baba ndiye anayesababisha jinsia ya mtoto kwa kumrithisha kromosomu Y (mtoto wa kiume) au kromosomu X tu (mtoto wa kike).
Saikolojia inaonyesha pia umuhimu wa kuwepo kwa baba mwenye pendo, akishirikiana na mama, katika kukua kwa mtoto.
Viungo vya nje

Marcia C. Inhorn, Wendy Chavkin, and Jose-Alberto Navarro, eds. Globalized Fatherhood by  (Berghahn Books; 2014) 419 pages; studies by anthropologists, sociologists, and cultural geographers -
M.J. Diamond (2007) My Father Before Me; How Fathers and Sons Influence Each Other Throughout Their Lives. New York: WW Norton.
None